Answer:
He got burned because he went into the church to get johnny because the roof caved in on him and ember fell on johnny's back.
Explanation:
Eventually, Magnus reveals himself to have multiple identities. He is Albert (Cynthia's long-lost husband) as well as the real Inspector Hound. And Hound (played by Moon) is actually the madman, masquerading as Inspector Hound.Mar 2, 2016
Http://horror.wikia.com/wiki/List_of_deaths_in_Child's_Play_series
This might help!